It is a small, unpainted steel or aluminium can with 3 steel wires coming out of the steel base plate. The container was sealed with resin and filled with either resin, glass dust, epoxy or a puff of argon gas.

The H06C variant with 6 pins and the H08A variant has 8 pins with the marker tab over the last one. The pin's counting order is clockwise from taken from the bottom perspective, the tab marking the first in the count.